as we all know that without utilities plants can not run.. so it is very important to study the utilities used in the chemical plants, mostly in the heat exchanger or any heating and cooling equipment selection of utilities plays important role... So firstly what is Utilities?? Utility is inseparable part of process plant It is not counted directly as a product, which leaves company premises. But ignoring them may have significant effect on overall profit Input and Output from Process Plant Hear some of the utilities are listed .. Steam Cooling water Air Refrigerant Brine Hot oil Hydrogen Inert gas (Nitrogen, Helium, Argon) Electricity etc... Now commonly as a cooling utility we have 2 option available 1. Cooling Water 2. Cooling Air.. So now thing is how to select from this two? so for that comparison is given below.. Cooling Water ...